Request to Make the Table of Contents Collapsible in Skin:Citizen

[pppery]

Feature summary (what you would like to be able to do and where):

I want a collapsible table of contents in Skin:Citizen.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

I found the table of contents in Skin:Citizen is not collapsible.

Benefits (why should this be implemented?):

If it is achieved, then I can read some long text like tables easily.

Refiled from https://phabricator.wikimedia.org/T336629

[alistair3149]

Yes it is a feature that I'm looking into but I don't have an ETA for it currently.